Got a new AMD RX 7600 to replace my ancient nVidia GTX 1050 Ti, decided to also switch from Manjaro to OpenSUSE Tumbleweed at the same time. Did a nuke-and-pave, installed all my apps from scratch, mostly from OpenSUSE repos, a few from flathub. I jump into kdenlive to work on a new project and after my proxies build, I go to edit the first video segment and discover that the scrubbing is horribly slow, i.e., it doesn’t keep up with the playhead. I tried switching from the OpenSUSE repo version to the one from flathub, same problem. I open an old project, and that one scrubs smooth as butter. It’s on the same hard disk as my new project, so that’s not it. I looked at project settings for the old project and the new one and they look the same to me. Next, I copied the proxy that kdenlive generated for the new proj into a new folder, created a new project in kdenlive, added that proxy movie clip into the project bin, and put it on the timeline. When I tried scubbing it, same problem as before, and this movie was 640x360 AVC file generated by kdenlive as a proxy, so if anything should scrub, it should.
I then created another folder, copied one of the proxy files from the old project that still scrubbed like butter, created a new project in kdenlive, imported it into the clips bin, and dumped it onto the timeline. Scrubbed like butter. This file was a 800x450 AVC file generated by kdenlive as a proxy.
At this point, I’m scratching my head as to what could be the problem. Figuring that divide and conquer is a good strategy, I open the project that doesn’t scrub well (the one using the 640x360 AVC file), ungroup the audio & video tracks, and delete the audio. Now it scrubs like butter.
But this makes no damn sense, as the audio tracks in that movie and the one that work are both listed as 130kbps AAC stereo tracks, both generated by kdenlive, so why would one work and the other not?!?
Anyone have any ideas as to what might be wrong, or something else I can test?